Suppress cancer with complication by Canavalia ensiformis extract

ABSTRACT

The present invention relates to a method of suppressing malignant conditions, including cancer with complications such like liver disorder, renal disorder and platelet disorder in bleeding, by administering a composition of an extract of  Canavalia ensiformis . Also, the invention is nontoxic to the individual and for improving functions of kidney as well as of liver, especially when involved in cancer.

BACKGROUD OF THE INVENTION

This invention concerns generally to suppress malignant conditions especially when in cancer, in hepatitis as well as to protect organs in functional disorder or chemical damage.

Most chemotherapy for cancer patients will cause greatly damage to important organs so called side effects, which usually include such as hepatitis, hemopoetic deficiency or renal disorders.

Therefore, valid methods for improving functions of organs in cancer therapy were developed to use a Canavalia ensiformis extract for that purpose effectively.

In the past, a purification of Canavalia ensiformis, concanavalinA (ConA) had been tried in vivo and in vitro. Pure ConA was reported to induce toxic effects such as hepatitis and hemagglutination in vivo. However, either ConA or Canavalia ensiformis was not proved in vivo to against cancer with complication. This invention was by using an Canavalia ensiformis extract, not a pure ConA, as an alternative to suppress cancer with complication.

BRIEF SUMMARY OF THE INVENTION

Accordingly, it is an object of this invention to provide an effective method of suppressing malignant complication.

Another object of this invention is to provide an effective method of suppressing cancer.

Another object of this invention is to provide an effective method of improving functions of organs.

Another object of this invention is to provide a composition of Canavalia ensiformis extract for effects of tumor cytotoxicity.

Other and further objects of this invention will become apparent from the illustrative embodiments, and various advantages not referred to herein will occur to one skilled in the art on employment of the invention in practice.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a MCF-7 cell proliferation assay in which the ordinate indicates relative cell number(% of control), and the abscissa indicating the concentration of extract in solution(mg/ml);IC₅₀: 24.3 μg/ml

FIG. 2 shows a LLC-1 cell proliferation assay in which the ordinate indicates relative cell number(% of control) , and the abscissa indicating the concentration of extract in solution(mg/ml);IC₅₀: 49.2 μg/ml

FIG. 3 shows a SW480 cell proliferation assay in which the ordinate indicates relative cell number(% of control) , and the abscissa indicating the concentration of extract in solution(mg/ml);IC₅₀: 36.5 μg/ml

FIG. 4 shows a PC-3 cell proliferation assay in which the ordinate indicates relative cell number(% of control), and the abscissa indicating the concentration of extract in solution(mg/ml); IC₅₀: 74.5 μg/ml

FIG. 5 shows a TSGH8301 cell proliferation assay in which the ordinate indicates relative cell number(% of control), and the abscissa indicating the concentration of extract in solution(mg/ml); IC₅₀: 31.8 μg/ml

FIG. 6 shows a Hela cell proliferation assay in which the ordinate indicates relative cell number(% of control), and the abscissa indicating the concentration of extract in solution(mg/ml); IC₅₀: 33.5 μg/ml

FIG. 7 shows a Paca-2 cell proliferation assay in which the ordinate indicates relative cell number(% of control), and the abscissa indicating the concentration of extract in solution(mg/ml); IC₅₀: 35.5 μg/ml

FIG. 8 shows a AGS cell proliferation assay in which the ordinate indicates relative cell number(% of control), and the abscissa indicating the concentration of extract in solution(mg/ml); IC₅₀: 37.0 μg/ml

FIG. 9 shows a HepaG2 cell proliferation assay in which the ordinate indicates relative cell number(% of control), and the abscissa indicating the concentration of extract in solution(mg/ml); IC₅₀: 39.5 μg/ml

FIG. 10 shows a relationship to the concentration of Aspartate Aminotransferase (AST/GOT) of the treated group and of the controlled group of C57BL/6.

FIG. 11 shows a relationship to the concentration of Alanine Aminotransferase (ALT/GPT) of the treated group and of the controlled group of C57BL/6.

FIG. 12 shows a relationship to the numbers of platelet of the treated group and of the controlled group of C57BL/6.

FIG. 13 shows a relationship to the concentration of Urea Nitrogen(BUN) of the treated group and of the controlled group of C57BL/6.

FIG. 14 shows a related weight of tumors of the treated group and of the controlled group of C57BL/6.

DETAILED DESCRIPTION OF THE INVENTION

The inventor has been investigating in finding an effective method of suppressing cancer with malignant complications of hepatitis, platelet disorder as well. Some extracts of herbs maybe possibly useful for cancer therapy, such as Canavalia ensiformis extract of its roots, seeds, flowers, leaves or branches. The preferred embodiment proved a Canavalia ensiformis extract plays an excellent role not only in suppressing malignant complication including cancer, hepatitis, renal disorder and platelet disorder but also in improving functions of liver and kidney. A preferred embodiment of process for preparing the Canavalia ensiformis extract may be by salting the ground seeds of Canavalia ensiformis in Nacl solution, (NH4)₂SO₄ extracting, water extracting and spray drying. The powder of Canavalia ensiformis extract (herein refered to as “extract”) is obtained. It may be as a powder drug itself or dissolved in aqueous solvent and used as a pharmaceutical solution.

There is no particular restriction for the administration form. The formulations for oral administration illustratively include tablets, pills, granules, soft and hard capsules, dispersions, fine granules, powders, emulsions, suspensions, syrups, elixirs and the like.

For the formulation of the effective ingredient of this present invention, routine processes should be followed, employing appropriately surfactants, excipients, coloring agents, flavorings, sweetening agents, preservatives, stabilizers, buffers, suspending agent, istonic agents, vitamins, minerals, nutritional supplements and other substances.

The content of the “extract” should be dosed appropriately, depending on the extent of the condition of the patient administration form, the age and the like.

Generally, the recommended dosage is within 2 g/kg, that is 2 grams of the “extract” of per kilogram of bodyweight as a composition for oral administration.

This invention should be understood more readily with reference to the following examples; however these examples are intended to illustrate the invention and are not to be constructed to limit the scope of the invention. BEST MODE OF CARRYING OUT THE INVENTION

EXAMPLE 1

The ground seeds of Canavalia ensiformis as crude powdered form was salting in more than 30% of sodium chloride solution and stirring continuously for approximately 4 hours then precipitation. Collected the precipitate and dissolved again to obtain the suspension, (NH4)₂SO₄ added for the precipitate collect. Then dissolved it in water for 4 hours for precipitation.

The precipitate was removed out to obtain a soluble extract and the same was spray dried to result in a powder of Canavalia ensiformis extract.

To prove the medical effect of this invention, a plurality of experiments were performed as follows.

Dissolved the “extract” in aqueous solvent, PBS(phosphate buffer solution), to an original concentration at 1 mg of “extract”/1 ml of PBS, and ready to use.

In vitro test of tumor cytotoxicity:

All the following cell lines are from ATCC, USA, except the TSGH8301.

-   (1) MCF-7, cells of mammary gland of human breast adenocarcinoma. -   (2) LLC-1, cells of Lewis lung carcinoma. -   (3) SW480, cells of a primary adenocarcinoma of the human colon. -   (4) PC-3, cells of metastatic site of human prostate carcinoma. -   (5) TSGH 8301, cells of human bladder carcinoma. -   (6) Hela, epithelia cells of human cervical adenocarcinoma. -   (7) Paca-2, cells of human pancreas carcinoma. -   (8) AGS, cells of human garstric adenocarcinoma. -   (9) Hepa G2, cells of human hepatocellular adenocarcinoma.

The original concentration at 1 mg of extract/1 ml of PBS (ie, 1 mg/ml) was separately diluted into 4 tubes of concentration at 300 μg/ml, 150 μg/ml, 75 μg/ml and 37.5 μg/ml.

EXAMPLE 2

The MCF-7 cells were added as the number of 1×10⁴ cells/ml to wells of 96-well plate. Each well was added therein above different concentration of the “extract” solution, i.e, 300 μg/ml, 150 μg/ml, 75 μg/ml and 37.5 μg/ml respectively for incubation of the cancer cells for 72 hours.

Then added 0.1 ml of culture medium and 0.1 ml of M.T.T for 2 hours, incubated with extracting solution for 2 hours and obtained data by ELISA reader as shown in Fig.I.

It proved the “extract” was cytotoxic to MCF-7 and other above mentioned cancer cells with apparent effect in following experiments of the invention.

EXAMPLE 3

The experimental procedures of Example 2 are repeated by investigating the cells of LLC-1 to obtain data as results shown in FIG. 2.

EXAMPLE 4

The experimental procedures of Example 2 are repeated by investigating the cells of SW480 to obtain data as results shown in FIG. 3.

EXAMPLE 5

The experimental procedures of Example 2 are repeated by investigating the cells of PC-3 to obtain data as results shown in FIG. 4.

EXAMPLE 6

The experimental procedures of Example 2 are repeated by investigating the cells of TSGH8301 to obtain data as results shown in FIG. 5.

EXAMPLE 7

The experimental procedures of Example 2 are repeated by investigating the cells of Hela to obtain data as results shown in FIG. 6.

EXAMPLE 8

The experimental procedures of Example 2 are repeated by investigating the cells of Paca-2 to obtain data as results shown in FIG. 7.

EXAMPLE 9

The experimental procedures of Example 2 are repeated by investigating the cells of AGS to obtain data as results shown in FIG. 8.

EXAMPLE 10

The experimental procedures of Example 2 are repeated by investigating the cells of HepaG2 to obtain data as results shown in FIG. 9.

EXAMPLE 11

In vivo test of animal module of suppressing malignant tumor.

The chosen C57BL/6 mice were 20 grams in an average of weight. Then, divided into bellowed 2 groups, 10 mice (5 males, 5 females) of each group for experiment.

-   -   (a) The controlled group: Each one injected with LLC-1 for 5×10⁶         cells, 7 days later, daily fed to basal diet. Daily observed         till the 30^(th) day for anatomy.     -   (b) The treated group: Each one injected with LLC-1 for 5×10⁶         cells, 7 days later, daily fed to 2 grams of the “extract” by         weight of per kg of C57BL/6 in basal diet. Daily observed till         the 30^(th) day for anatomy.

Removed and weighed the tumors of both groups to obtain the results: (as shown in FIG. 14)

-   -   (a) The average weight of tumor of the controlled group was         9.55±0.05 grams on the 30^(th) day.     -   (b) The average weight of tumor of the treated group was         4.52±0.05 grams on the 30^(th) day.

It proved the “extract” effectively suppressed the malignant tumor, cancer.

EXAMPLE 12

In vivo test:

Followed by Example 11, on the 11^(th), bleeding 0.2 ml blood of the controlled group and of the treated group; centrifuged for serum collect, analysed ALT/GPT by biochemical analyzer.

Results: (as shown in FIG. 11)

-   -   (a) The average level of ALT/GPT of the controlled group was 168         U/L.     -   (b) The average level of ALT/GPT of the treated group was 76         U/L.

The normal range of level should be in 28˜132 U/L for a funcitional liver. The controlled group happened a complication of acute hepatitis but the treated group did not. The extract suppressed acute hepatitis and played an important role in improving functions of liver.

EXAMPLE 13

In vivo test:

Followed by Example 11, on the 11^(th), bleeding 0.2 ml blood of the controlled group and of the treated group; centrifuged for serum collect, analysed AST/GOT by biochemical analyzer.

Results: (as shown in FIG. 10)

-   -   (a) The average level of AST/GOT of the controlled group was 256         U/L.     -   (b) The average level of AST/GOT of the treated group was 96         U/L.

The normal range of level should be in 59˜247 U/L for a functional liver. The controled group happened a complication of chronic hepatitis but the treated group did not. The “extract” suppressed chronic hepatitis and again to play an important role in improving functions of liver.

As well known, acute hepatitis with chronic hepatitis becomes a critical condition of liver, it was also found to happen cells death of liver of the controlled group in further pathologic examinations. The “extract” suppressed a malignant condition of hepatitis, cancer with complication.

EXAMPLE 14

In vivo test:

Followed by Example 11, to count the numbers of platelet in plasma of the controlled group and of the treated group by cell counter on the 30^(th) day.

Results: (as shown in FIG. 12)

-   -   (a) The average level of platelet of the controlled group was         478 k/μl.     -   (b) The average level of platelet of the treated group was 829         k/μl.

As well known, platelets are produced partly by liver. Deficiency of platelet will fail to coagulate when bleeding. Therefore, it proved the “extract” suppressed a malignant condition of platelet disorder, cancer with complication.

EXAMPLE 15

In vivo test:

Followed by Example 11, on the 15^(th), bleeding 0.2 ml of blood of the controlled group and of the treated group; centrifuged for serum collect, analysed BUN by biochemical analyzer.

Results: (as shown in FIG. 13)

-   -   (a) The average level of BUN of the controlled group was 56         mg/dl.     -   (b) The average level of BUN of the treated group was 20 mg/dl.

The normal range of level should be in 18˜29 mg/dl. Apparently, the renal function of the controlled group was damaged, but of the treated group was not. Therefore, the “extract” suppressed cancer with complication, the renal disease, and improve functions of kidney.

EXAMPLE 16

In vivo toxicity test:

Selected 10 rats(5 moles, 5 females) in an averaged weight of 220˜250 g of each rat. 8 rats, as the test group, fed to 2 g of “extract” by weight of per kg in basal diet. The other 2 rats fed to basal diet as the controlled group. Daily fed for 28 days, observed and recorded to an average.

Results: WBC RBC Hb Platelet Weight Toxic (k/μl) (k/μl) (g/dl) (k/μl) Hair&Skin (g) Syndrome The 1^(st) day Test 4.55 6.6 12.1 655 Normal 255 None Controlled 4.70 8.2 13.3 553 Normal 251 None The 28^(th) Test 5.35 7.2 12.5 672 Normal 571 None day Controlled 4.05 7.9 12.8 532 Normal 585 None

It proved the “extract” is non-toxic by oral administration.

It should be also be understood the foregoing relates to only a preferred embodiment of the invention and that it is intended to cover all changes and modifications of the examples of the invention herein chosen for purposed of the disclosure, which do not constitute departures from the spirit and the scope of the invention.

INDUSTRIAL APPLICABILITY

The invention is prepared for suppressing cancer with hepatitis, renal disorder or hemopoetic disorder. Also, it is for improving functions of liver and kidney.

A preferred embodiment of composition may be optionally adjusted for a proper formulation and applied to a humanbeing as follows: Canavalia ensiformis extract 80%˜98% (by weight); Nutritional supplements  3%˜10% (by weight); Preservatives  0.5%˜3% (by weight); Buffers  0.5%˜3% (by weight); Stabilizers  1%˜4% (by weight);

Other excipients may be further added into the above composition as mentioned. 

1. A method of suppressing cancer with complication comprising administering an amount of a composition comprising an extract of Canavalia ensiformis.
 2. The method according to claim 1, wherein said cancer is lung cancer.
 3. The method according to claim 1, wherein said cancer is gastric cancer.
 4. The method according to claim 1, wherein said cancer is prostate cancer.
 5. The method according to claim 1, wherein said cancer is cervical cancer.
 6. The method according to claim 1, wherein said cancer is breast cancer.
 7. The method according to claim 1, wherein said cancer is pancreas cancer.
 8. The method according to claim 1, wherein said cancer is bladder cancer.
 9. The method according to claim 1, wherein said cancer is colorectal cancer.
 10. The method according to claim 1, wherein said cancer is hepatoma.
 11. The method according to claim 1, wherein said complication is liver disorder.
 12. The method according to claim 11, wherein said liver disorder is hepatitis.
 13. The method according to claim 1, wherein said complication is platelet disorder.
 14. The method according to claim 1, wherein said complication is renal disorder.
 15. The method according to claim 1, wherein said extract is processed by using (NH₄)₂SO₄.
 16. The method according to claim 1, wherein said extract is further obtained by using water.
 17. The method according to claim 1, wherein said Canavalia ensiformis is the seed of Canavalia ensiformis.
 18. The method according to claim 1, wherein said composition is further added to a nutritional supplement.
 19. The method according to claim 17, wherein said nutritional supplement is a mineral containing compound selected from the group consisting of calcium, chloride, sodium, potassium, magnesium, sulfur, phosphorus, zinc, iron, copper, iodine and manganese.
 20. The method according to claim 1, wherein said composition is further added to an excipient.
 21. The method according to claim 1, wherein said extract is nontoxic by oral administration within 2 g/kg per day. 